CN113035652A

CN113035652A - Permanent magnetic mechanism

Info

Publication number: CN113035652A
Application number: CN202110408745.1A
Authority: CN
Inventors: 齐东迁; 张勇; 苏珂嘉; 李斌; 赵启东; 陈光华; 丁乐朋; 陈硕之; 陈攀; 张欢
Original assignee: DIANGUANG EXPLOSION-PROOF TECHNOLOGY CO LTD
Current assignee: DIANGUANG EXPLOSION-PROOF TECHNOLOGY CO LTD
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-06-25

Abstract

The utility model relates to a permanent magnet mechanism, including permanent magnet casing, be provided with closing coil and separating brake coil and sliding connection in the iron core in the permanent magnet casing, one side that the iron core deviates from separating brake coil is provided with the connecting axle that runs through permanent magnet casing, the mounting groove has been seted up to the terminal surface that the iron core deviates from the connecting axle, the tank bottom of mounting groove runs through and is equipped with the through-hole that supplies the connecting axle to wear to establish, the tip of connecting axle in the mounting groove is provided with first stopper, the inner wall of mounting groove is provided with the mounting, be provided with the overtravel spring between mounting and the first stopper, the slip stroke of. The iron core slides to the in-process connecting axle that laminates mutually with the inner wall of permanent magnetism casing under the effect of magnetism and puts in place in advance and realize closing a floodgate, and the first stopper then extrudees the overtravel spring after the iron core puts in place, provides the overtravel to the connecting axle. The spring outside the permanent magnet shell is eliminated, the occupied space of the permanent magnet mechanism is reduced, and a good foundation is provided for the circuit breaker to be small.

Description

Permanent magnetic mechanism

Technical Field

The application relates to the technical field of circuit breakers, in particular to a permanent magnet mechanism.

Background

The permanent magnet mechanism is a core structure of an operating mechanism in the circuit breaker and is used for timely and reliably switching on and off the moving contact and the static contact of the circuit breaker so as to break off the connection of the circuit, namely the permanent magnet mechanism can control the circuit breaker to rapidly switch on and switch off, so that the safe operation of a power system is ensured.

The switching-on working principle of the permanent magnetic mechanism is as follows: the movable iron core assembly moves to the switching-on position under the action of electromagnetic attraction by utilizing a magnetic field generated by electrifying the switching-on coil.

The working principle of brake separation: based on the same principle as the switch-on, when the switch-off coil is electrified, the movable iron core assembly is at the switch-off position moved under the action of electromagnetic attraction.

The on/off brake keeping principle is as follows: when the closing/opening work is finished, the closing/opening coil is powered off, and the movable iron core assembly is attracted by the magnetic field generated by the permanent magnet, so that the operating mechanism is kept at the closing position.

In the correlation technique, still include the vacuum tube among the circuit breaker, moving contact and static contact set up in the vacuum tube, and the one end of iron core subassembly is connected with the moving contact through the swing arm, and permanent magnetic mechanism drives the swing arm at closing/separating brake working process and carries out the swing back and forth in order to realize the deciliter between moving contact and the static contact, and is connected with the spring between swing arm and the moving contact in order to guarantee the abundant laminating between moving contact and the static contact, and then improves the security.

For the permanent magnet mechanism in the related art, the inventor thinks that the occupied space is large and needs to be improved.

Disclosure of Invention

In order to reduce the occupation space of a permanent magnet mechanism, the application provides the permanent magnet mechanism.

The application provides a permanent magnetic mechanism, adopts following technical scheme:

the utility model provides a permanent magnetic mechanism, includes the permanent magnetism casing, be provided with closing coil and separating brake coil and sliding connection in the iron core in the permanent magnetism casing, one side that the iron core deviates from the separating brake coil is provided with the connecting axle that runs through the permanent magnetism casing, the iron core deviates from the terminal surface of connecting axle and has seted up the mounting groove, the tank bottom of mounting groove runs through and is equipped with the through-hole that supplies the connecting axle to wear to establish, the tip of connecting axle in the mounting groove is provided with first stopper, the inner wall of mounting groove is provided with the mounting, be provided with the overtravel spring between mounting and the first stopper, separating brake to closing process the slip stroke of.

By adopting the technical scheme, the opening coil and the closing coil drive the iron core to slide back and forth in the permanent magnet shell under the power-on state so as to drive the connecting shaft to move, so that the opening and closing of the moving contact and the static contact in the vacuum tube are realized through the movement of the connecting shaft. In the process from opening to closing, the sliding stroke of the connecting shaft is smaller than that of the iron core, namely the iron core slides to be attached to the inner wall of the permanent magnet shell under the action of magnetic attraction, the connecting shaft is already in place in advance and the closing is realized, and the first limiting block extrudes the overtravel spring after the iron core is in place, so that the closing overtravel is provided for the connecting shaft. In addition, compared with the related art, the permanent magnet circuit breaker cancels the spring outside the permanent magnet shell, reduces the occupied space of the permanent magnet mechanism, and provides a good foundation for making the circuit breaker small.

Optionally, the fixing piece is a fixing ring, and the fixing ring is in threaded connection with the inner wall of the mounting groove.

Through adopting above-mentioned technical scheme, in the mode through threaded connection will gu fixed ring installs the mounting groove, the installation of being convenient for when structural stability is strong.

Optionally, the last separating brake axle that stretches out and run through permanent magnetism casing from the mounting groove opening that is provided with of solid fixed ring, the tip that the permanent magnetism casing was kept away from to separating brake axle is provided with the clamping ring, be provided with the separating brake spring that the cover was located the separating brake axle outside between clamping ring and the permanent magnetism casing.

Through adopting above-mentioned technical scheme, through the setting of separating brake axle, for the separating brake spring provides the mounted position, because the separating brake axle shifts up along with the iron core is whole when closing a floodgate for the separating brake spring is compressed, and when closing a floodgate state to separating brake state, the elasticity that provides through the separating brake spring can improve the rigid speed of opening of circuit, with the security that improves the separating brake.

Optionally, the one end of branch floodgate axle in the mounting groove is worn to locate solid fixed ring and is provided with the second stopper, the second stopper is inconsistent with the solid fixed ring lateral wall towards the connecting axle.

Through adopting above-mentioned technical scheme, install the separating brake axle on solid fixed ring through the mode of wearing to establish to spacing and the spring action of separating brake spring through second stopper, clamping ring make the separating brake axle can fix on solid fixed ring with comparatively simple mode, improved the installation convenience.

Optionally, the permanent magnet casing includes a permanent magnet drum, and a front end cover and a rear end cover respectively disposed at two ends of the permanent magnet drum, the inner wall of the permanent magnet drum is provided with a plurality of permanent magnets, the permanent magnet drum is located between the closing coil and the opening coil, and the plurality of permanent magnets are arranged along the circumferential direction of the permanent magnet drum.

By adopting the technical scheme, the permanent magnets are axially arranged on the inner wall of the permanent magnet cylinder, so that the permanent magnet cylinder, the front end cover and the rear end cover are sufficiently magnetized to form a magnetic field, and the iron core can be stably attracted on the front end cover or the rear end cover after the closing coil or the opening coil is powered off.

Optionally, the inner walls of the plurality of permanent magnets are provided with magnetic conductive rings.

Through adopting above-mentioned technical scheme, through the setting of magnetic ring for the iron core can be pressed close to more to the magnetic ring, and the magnetization of magnetic ring through the permanent magnet can produce certain magnetism to the iron core and inhale the effect, makes the iron core can be removed to the intermediate position by more fast in the switching-over in-process of combined floodgate and separating brake, and then improves the speed of combined floodgate and separating brake, improves the security.

Optionally, the end faces of the two sides of the magnetic conductive ring and the permanent magnets are flush with each other and are respectively abutted against the side walls of the opening coil and the closing coil.

By adopting the technical scheme, the structural stability of the magnetic conduction ring and the permanent magnets is improved.

Optionally, a manual switching-off assembly is arranged on the rear end cover, the manual switching-off assembly comprises a hand distribution pin penetrating through the rear end cover, and the end of the hand distribution pin is located in the rear end cover when in a switching-on state.

Through adopting above-mentioned technical scheme, promote the iron core through pressing the hand distribution and make iron core and rear end cap phase separation, the magnetic attraction between iron core and the rear end cap after the separation is less than the elasticity of separating brake spring for the iron core removes towards the front end cap direction fast under the elastic force effect, and then realizes manual separating brake.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the opening coil and the closing coil drive the iron core to slide back and forth in the permanent magnet shell under the power-on state so as to drive the connecting shaft to move, and therefore opening and closing of the moving contact and the static contact in the vacuum tube are achieved through movement of the connecting shaft. In the process from opening to closing, the sliding stroke of the connecting shaft is smaller than that of the iron core, namely the iron core slides to be attached to the inner wall of the permanent magnet shell under the action of magnetic attraction, the connecting shaft is already in place in advance and the closing is realized, and the first limiting block extrudes the overtravel spring after the iron core is in place, so that the closing overtravel is provided for the connecting shaft. In addition, compared with the related art, the permanent magnet circuit breaker cancels a spring outside the permanent magnet shell, reduces the occupied space of the permanent magnet mechanism, and provides a good foundation for making the circuit breaker small;

2. the arrangement of the brake separating shaft provides an installation position for the brake separating spring, the brake separating spring is compressed due to the fact that the brake separating shaft moves upwards along with the iron core integrally during switching-on, and the rigid switching-off speed of the circuit can be improved through the elastic force provided by the brake separating spring during switching-on to switching-off, so that the safety of switching-off is improved;

3. through wearing the minute brake axle to locate in the fixed ring and utilize the second stopper to fix a position, the spring passes through the clamping ring and strains the minute brake axle to the threaded connection of cooperation fixed ring and mounting groove makes the lower half subassembly of iron core very convenient and stability good in the installation.

Drawings

Fig. 1 is a schematic structural diagram of the permanent magnet mechanism in an opening and closing state according to the embodiment of the present application.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is an exploded view of the permanent magnet housing in the embodiment of the present application.

Description of reference numerals: 1. a closing coil; 2. a brake separating coil; 3. a permanent magnet housing; 31. a permanent magnet drum; 32. a front end cover; 33. a rear end cap; 34. a magnetic conductive ring; 35. a permanent magnet; 4. an iron core; 5. a connecting shaft; 6. mounting grooves; 7. a first stopper; 8. a fixing ring; 9. an over travel spring; 10. a brake separating shaft; 11. a second limiting block; 12. pressing a ring; 13. a brake separating spring; 14. a manual brake-separating component; 141. and (5) hand distribution.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a permanent magnet mechanism. Referring to fig. 1 and 2, the permanent magnet mechanism includes a permanent magnet housing 3, a closing coil 1, an opening coil 2 and an iron core 4 slidably connected inside the permanent magnet housing 3 are disposed in the permanent magnet housing 3, and a connecting shaft 5 penetrating through the permanent magnet housing 3 is disposed on one side of the iron core 4 departing from the opening coil 2.

Referring to fig. 2 and 3, the permanent magnet housing 3 includes a permanent magnet cylinder 31, and a front end cover 32 and a rear end cover 33 respectively closing openings at two ends of the permanent magnet cylinder 31, and the front end cover 32 and the rear end cover 33 are fixedly connected to the permanent magnet cylinder 31 by bolts. The middle part in the permanent magnet barrel 31 is provided with a magnetic conduction ring 34 in the axial direction, the peripheral side wall of the magnetic conduction ring 34 is circumferentially provided with a plurality of permanent magnets 35, the magnetic conduction ring 34 is flush with the end surfaces of the two sides of the plurality of permanent magnets 35, the permanent magnets 35 are fixedly connected with the magnetic conduction ring 34, and the peripheral side wall of the permanent magnets 35 is attached to the inner wall of the permanent magnet barrel 31. The permanent magnet cylinder 31, the front end cover 32, the rear end cover 33 and the magnetic conductive ring 34 are made of iron materials and can be magnetized by the permanent magnet 35.

Referring to fig. 2 and 3, the frameworks of the closing coil 1 and the opening coil 2 are all spool structures with axial through holes, the peripheral side walls of the two spools are attached to the inner wall of the permanent magnet drum 31, the two opposite side walls of the closing coil 1 and the opening coil 2 are respectively abutted to the two side walls of the magnetic conductive ring 34, the through holes of the two spools are communicated with the through holes of the magnetic conductive ring 34 and overlapped to form a movable cavity, the iron core 4 is positioned in the movable cavity to slide, and a gap is reserved between the iron core and the inner wall of the movable cavity to reduce friction. The closing coil 1 is abutted against the inner wall of the rear end cover 33, and the opening coil 2 is abutted against the inner wall of the front end cover 32. The permanent magnet mechanism not only has a convenient dismounting structure, but also has excellent installation stability.

Referring to fig. 2, mounting groove 6 has been seted up to the terminal surface that iron core 4 deviates from connecting axle 5, and the tank bottom of mounting groove 6 runs through to have the through-hole that supplies connecting axle 5 to wear to establish, and connecting axle 5 tip in mounting groove 6 is provided with first stopper 7. Mounting groove 6 is provided with the internal thread in the inner wall of opening part, and the lateral wall of solid fixed ring 8 is provided with external screw thread and threaded connection on the inner wall of mounting groove 6, is provided with overtravel spring 9 between solid fixed ring 8 and the first stopper 7, and the elastic force effect through overtravel spring 9 makes first stopper 7 inconsistent with the tank bottom of mounting groove 6 when the separating brake state.

Referring to fig. 2, when the circuit breaker is switched on from the open position to the close position, the iron core 4 drives the fixing ring 8, the over travel spring 9 and the connecting shaft 5 to move towards the close coil 1, the connecting shaft 5 preferentially drives the moving contact and the fixed contact in the vacuum tube to be switched on in the moving process, a certain gap is left between the iron core 4 and the rear end cover 33 at the moment, when the iron core 4 further moves to be attached to the rear end cover 33, the over travel spring 9 is pushed to be compressed by the fixing ring 8, and a gap is gradually generated between the groove bottom of the mounting groove 6 and the first limiting block 7, namely, the sliding stroke of the connecting shaft 5 from the open position to the close position is smaller than that of the iron core 4, so that the over travel spring 9 provides elastic force required by the over travel for the connecting shaft 5, and the gap generated between the groove.

Referring to fig. 2, gu be provided with on the fixed ring 8 and stretch out and run through the separating brake axle 10 of front end housing 32 from the 6 openings of mounting groove, separating brake axle 10 wears to locate fixed ring 8 and fixedly connected with second stopper 11 in the one end of mounting groove 6, the fixed cover of the one end that front end housing 32 was kept away from to separating brake axle 10 is established the cover and is equipped with clamping ring 12, be provided with the separating brake spring 13 that the cover was located the separating brake axle 10 outside between clamping ring 12 and the front end housing 32, make second stopper 11 inconsistent with the lateral wall of fixed ring 8 orientation connecting axle 5.

When the brake is opened, the brake opening spring 13 is compressed to provide larger elastic potential energy, so that the rigid opening speed of the brake opening can be effectively improved.

Referring to fig. 1 and 2, the rear end cover 33 is fixedly connected with the manual opening/closing assembly 14, the manual opening/closing assembly 14 includes a manual pin 141 penetrating through the rear end cover 33, an end of the manual pin 141 is located in the rear end cover 33 in a closing state, the manual pin 141 is pushed to enable the iron core 4 and the rear end cover 33 to generate a gap so as to reduce a magnetic attraction effect between the iron core 4 and the rear end cover 33, and the rapid manual opening/closing can be realized by overcoming the reduced magnetic attraction effect under the elastic effect of the opening/closing spring 13.

And because the over travel spring 9 is compressed to provide an over travel range, the brake cannot be opened immediately when manual brake opening is carried out, and the brake cannot be opened until the elastic force of the brake opening spring 13 overcomes the magnetic attraction between the iron core 4 and the rear end cover 33. The opening speed is not reduced manually and potential safety hazards are avoided, and safety is guaranteed.

It should be noted that the opening coil 2 and the closing coil 1 are powered off after being powered on to realize opening/closing, and the iron core 4 maintains a fixed state through a magnetic attraction effect generated by the rear end cover 33 and the front end cover 32.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a permanent magnetic mechanism, includes permanent magnetism casing (3), be provided with closing coil (1) and separating brake coil (2) and iron core (4) of sliding connection in permanent magnetism casing (3), its characterized in that: one side that iron core (4) deviate from separating brake coil (2) is provided with connecting axle (5) that runs through permanent magnetism casing (3), iron core (4) deviate from the terminal surface of connecting axle (5) and seted up mounting groove (6), the tank bottom of mounting groove (6) is run through and is had the through-hole that supplies connecting axle (5) to wear to establish, connecting axle (5) tip in mounting groove (6) is provided with first stopper (7), the inner wall of mounting groove (6) is provided with the mounting, be provided with overrun spring (9) between mounting and first stopper (7), separating brake to the combined floodgate in-process the slip stroke of connecting axle (5) is less than the slip stroke of iron core (4).

2. A permanent magnet mechanism according to claim 1, wherein: the mounting sets up to solid fixed ring (8), gu the inner wall threaded connection of fixed ring (8) and mounting groove (6).

3. A permanent magnet mechanism according to claim 2, wherein: the brake separating shaft (10) extending out of the opening of the mounting groove (6) and penetrating through the permanent magnet shell (3) is arranged on the fixing ring (8), the end portion, far away from the permanent magnet shell (3), of the brake separating shaft (10) is provided with a pressing ring (12), and a brake separating spring (13) sleeved outside the brake separating shaft (10) is arranged between the pressing ring (12) and the permanent magnet shell (3).

4. A permanent magnet mechanism according to claim 3, characterized in that: the one end of branch floodgate axle (10) in mounting groove (6) is worn to locate solid fixed ring (8) and is provided with second stopper (11), second stopper (11) and solid fixed ring (8) are inconsistent towards the lateral wall of connecting axle (5).

5. A permanent magnet mechanism according to claim 1, wherein: the permanent magnet shell (3) comprises a permanent magnet cylinder (31), a front end cover (32) and a rear end cover (33) which are arranged at two ends of the permanent magnet cylinder (31) respectively, wherein a plurality of permanent magnets (35) are arranged on the inner wall of the permanent magnet cylinder (31), the permanent magnet cylinder (31) is located between the closing coil (1) and the opening coil (2), and the permanent magnets (35) are arranged along the circumferential direction of the permanent magnet cylinder (31).

6. A permanent magnet mechanism according to claim 5, wherein: the inner walls of the permanent magnets (35) are provided with magnetic conductive rings (34).

7. A permanent magnet mechanism according to claim 6, wherein: the end faces of two sides of the magnetic conductive ring (34) and the permanent magnets (35) are flush and level and are respectively abutted with the side walls of the opening coil (2) and the closing coil (1).

8. A permanent magnet mechanism according to claim 5, wherein: be provided with manual separating brake subassembly (14) on rear end cap (33), manual separating brake subassembly (14) are including the hand distribution (141) that run through rear end cap (33), the tip of hand distribution (141) is located rear end cap (33) when closing a floodgate state.